Malicious PDF — malware analysis report

Static analysis result for SHA-256 89bc7cbce9db7272…

MALICIOUS

PDF

91.4 KB Created: 2021-08-08 12:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7dc197a9617181b73bfd42f20ab2db6b SHA-1: 3a9acf55b1b4d25dea4b311214edcba9e2e7ca51 SHA-256: 89bc7cbce9db7272929759acf143a75396e64267d8557664dcbf432ec09e814d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and points to compromised CMS upload storage, indicating it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=old+town+nice+france+real+estate PDF link annotation
    • http://www.peritaonline.es/ckfinder/userfiles/files/bovuwojakixapasisagima.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/bce388b9f700e64833ceecdcbde7b95c/sitiwivisevetut.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838af50b87e---pavobewedovovure.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160da7e509644e---36667188177.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f310e97cb---sorokuwitusulaniw.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872a1dce649---suvelufij.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/bbqcp9bp9sp9slvru7namn9941/14562016437.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cvi44q15hi3g2br7le7kh1gni1/75331230552.pdfIn PDF document text
    • http://agama-rc.com/upload/files/44602042416.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/xakobodipumarakutovefuwe.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/44169356695.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/66828477183.pdfIn PDF document text
    • http://speakingaboutnetworking.com/ckfinder/userfiles/files/safazazozirojinaxuw.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/7308819076089b252b71cb.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/sdqi602a82d8qlu1ibjes9f6p1/28424829907.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/67147941629.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab0172b11b---xapufefijo.pdfIn PDF document text
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/54150268097.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/noburosix.pdfIn PDF document text
    • http://maidichike.com/upload/files/29236337814.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/6565f756767adb8bc2e1ee413d5be3cf/20383817000.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070f0dbc49f8---diwumi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 10580 bytes
SHA-256: 766de84c2c770f485a171bcb016172f176a77fe56cdc97e6d9566a20f8416759
font_02_sfnt_off0001240a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240A 1784 bytes
SHA-256: cd9eab86120d361a84c9e08e79405e659c2348d5e6efa0e6e83135eb91adcf56
font_03_sfnt_off00012c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 18964 bytes
SHA-256: 7fa11dc37c43ab87a15a3588eadd37d7c76ddb15b762d6d9f835dd5002d8eea0

Open this report in the interactive analyzer, or submit your own file for analysis.